Hello OCM,
I took a look at your attached sample. If you are using the workbook for multi-user access then you should consider using the "Shared Workbook" feature, if thats not how your doing it? With the shared workbook setting more than one person can open and edit a workbook. You'll see "Share Workbook..." under the 'Tools' menu.
With the number of users and worksheets you have in the sample workbook you are bound to run into problems with your format. (1). because the size is going to get very large (2). with 14 users you will have conflicts often. You may think about creating a form and saving it as a template. Then have your users open the template fill out the report, and save it with a unique name in a designated location on your server. Then you make a process to open any new reports and aggragate the data into a list format in another workbook which also contains your summary report, that only you open and maintain. You may find you need to write some
VB script to automate the collection of the data.
MS Access is another alternative that would be a good option with the type of data and number of users in your group.